Combined dust-arrester and gas-cooler.



I P. J; DBRRIG. v COMBINED DUST ARRESTEB AND GAS COOLER.

APPLICATION FILED SEPT. 26;.19103 wanted my 11 1911] wuawt-oz wwwwoeo VaHom wgp "P, JQDERRIG. Y

COMBINED DUST ARRESTER AND GAS COOLER.

APPLICATION FILED SEPT.'26,1910.

- Patented July 11, 1911 2 SHEETSSHEET 2.

" To all whom 'it may concern:

Be it known that I, PATRICK J. DERBIG, a

- hurrah erarne Parana. orator}.

Y .PATZRICK J'.;DERRIG, OF NORTH WEYMOUTH, MASSACHUSETTS.

COMBINED DUST-ARRESTER AND GAS-COOLER.

- Specification of Letters Patent. Patented July 11, 1911.

Application filed September 26, 1910. Serial no. 583,890.

citizen of the United States, residing at North'l/Veymouth, in thecopnty of Norfolk and Stateof Massachusetts, have invented certain newand usefullmprovements in a Combined Dust-Arrester and 'Gas-Cooler; andI do declare the following to be a full, clear, and exact description ofthe invention,

such as will enable others skilled in the art to which it appertains tomake and use the same. Y e A p This invention relates to a combined dustarrester and gas cooler-for use in flues. between an ore roastingfurnaceand a Glover tower or contact chamber, and is an improvement overthe dust arrestershown in my pending application, Serial No. 562,217,

' filed May 19, 1910.

The object of-the invention is 'to' provide a simply constructed dustarrester which will serve also as a gas cooler and which may be cheaplyinstalled in a gas the between an ore roasting furnace and a Glovertower or contact chamber, and it is so constructed as to collect allof'the dust floating in the S0,,gas.

Another object of the invention is to provide a device of this characterwhich may bequickly cleaned without interfering with the operationof thesystem which will prevent any dust passing to the tower, which,

would cause oxidation of the nitrous compound contained therem.

With these and other objects in-view, the invention consists of certainnovel features of construction, combination and arrangement of parts aswill be more fully described and particularly pointed out in the appended claim.

In the accompanying drawings :Figure 1 represents a side elevationpartly inlongitudinal section of an apparatus embodying this invention;Fig. 2 is ahorizontal section through the gas fine with this combineddust arrester and gas cooler'applied thereto; Fig.

3 is a transverse section taken on the line 33 of Fig. 2, lookinginthe-direction of the arrow; and Fig. 1 is a detail sectional 'Viewshowing the lute arranged under the battle plates,

In the roasting furnace 1 is shown having a flue 2 leading therefrom forconducting theSO gas generated in the furnace to a Glover tower 3 orcontact chamber, which sulembodiment illustrated, an ore 'furic acid isproduced. This flue 2 is provided between the furnace 1 and the tower 3with an enlarged chamber 4 having a hop per-like bottom 5-provided witha closure (3 which'is preferably held inoperative position by means ofacoiled spring 7 The upper end of the hopper 5 is preferably pro videdwith apertured sliding plates 8 which operate over an apertured plate 9arranged below the baflie plates hereinafter to be described. Thesesliding plates are preferably constructed as shown in F ig, 1, and areof the adjacent bars being arranged in staggeredrelation as shown inFig. 2. These bars 10 which are arranged transversely of the chamber 4above thetop thereof are Y preferably provided with depending flanges 13adapted to engage upwardly projecting -flanges, as 4 arranged on the topof the chamber a as is shown .clearly in Fig. 1, and

these flanges 13 are preferably luted, the

lutes formed by the flanges being preferably filled with fine dust orother suitable material which prevents theescape of gas around theplates;

- Each of the bars 10 may be provided with any desired number of baflleplates 12, five beinghere, shown, which may be of any suitable ordesired sizeand constructed of any desired shape in cross section, beinghere shown triangular in cross section, and 'each provided. with avertical partition 14 extending from the to to a point near v thebottom. thereof, CllVlCllll eachbafl'le plate into an' inlet and an outet compartment to insure the circulation of the cooling fluid passing.therethrough. The plates of each series areconnected at their upperends by pipes, as 15, which are provided with :suitable' couplings 16,as shown in Fig. 3. The water or other cooling fluid enters the pipe 15at the point marked a and flows in the direction of the arrowsthroughthe respective hollow battle plates and out oithe pipe attheopposite side of the flue at the point marked Z), in Fig. 3. It willthus be obvious that each connected series of plates is provided with aseparate inlet and outlet whereby fresh water is supplied to each seriesto produce the proper cooling action.

The .bal'lie plates on onebar being arranged to alternate with those on.the adjacent bars, as shown clearly in Fig. 2 provide for the thoroughsifting and cooling of the gas passing between these plates and saidplates operate to eliminate all of the dust from the gas passing throughthe chamber 4. I

A track 14 is preferably supported above the flue 2 by any suitablemeans (not shown) and apulley 15 is slidably mounted thereon, preferablyby means of wheels 16. A flexible hoisting element 17 operates over saidpulley l5 and isprovided at one end with any suitable means for engagingthe hooks 11 of the bars 10 for raising the baffle plates carried by therespective bars above the flue when it is desired to clean them. \Vhenit is desired to clean these plates, each series connected with theirrespective bars 10 may be hoisted by means of the cable 17, as abovedescribed, and this upward movement causes the plates 12 to scrape onthe side walls of the'openings in the top of the flue, which cleans thedust from the plates and causes it to drop on the apertured slidingplates arranged above the hopper 5 from which it may be removed whennecessary. The battle plates being luted when lowered into operativeposition, the escape of gas around, them is prevented.

From the foregoing description, it will be obvious that the S0 as whichis hot and ings, the construction and operation of the invention will bereadily understood Without requiring a more extended explanation.

Various changes in the form, proportion and the mlnor details ofconstruction may a be resorted to without departing from the principleor sacrificing any of the advantages of this invention as defined in theappended claim.

What I claim as my invention isv:- v

A combined dust arrester and gas cooler comprising a'casing having aninlet at one end and an outlet at the other end, a pinrality of seriesof connected hollow baflie plates triangular. incross section andarranged in said casing, each plate being pro- .vided with a verticalpartition extending from the top to a point near the bottom thereof andeach provided near its top with a fluid inlet communicating with thecompartment formed at one side of said partition and With an outletcommunicating with the compartment formed at the other side of saidpartition, the plates of adjacent series being arranged in staggeredrelation.

'In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

PATRICK J. DERRIG. [Ls] \Vitnesses:

HERBERT A. NEWTON, GEORGE W. NEWCOMB.

